Industrialize or perish.

Necessity is the mother of invention.

It is possible to fly without motors, but not without knowledge and skill.

The first principle is that you must not fool yourself and you are the easiest person to fool.

Books are for people who wish they were somewhere else.

If I could explain it to the average person, I wouldn't have been worth the Nobel Prize.

The secret of life is not enjoyment but education through experience.

The only true wisdom is in knowing you know nothing.

The most savage controversies are those about matters as to which there is no good evidence either way.

The books that the world calls immoral are books that show the world its own shame.

No man's knowledge here can go beyond his experience.

It took us three years to build the NeXT computer. If we'd given customers what they said they wanted, we'd have built a computer they'd have been happy with a year after we spoke to them - not something they'd want now.

Courage, conviction and confidence.

All stable processes we shall predict. All unstable processes we shall control.

Science is a way of thinking much more than it is a body of knowledge.

In mathematics you don't understand things. You just get used to them.

A little knowledge that acts is worth infinitely more than much knowledge that is idle.

Science is what we have learned about how to keep from fooling ourselves.

Real learning comes about when the competitive spirit has ceased.

Educate the children and it won't be necessary to punish the men.

The deepest sin against the human mind is to believe things without evidence.